CVE-2026-86076Network attack vector

Authenticated code execution via sanitizer rebinding

Published Sep 8, 2026 · Updated Sep 9, 2026

Code injection in n8n before 1.123.76, 2.0.0 through 2.37.6, and 2.38.0 through 2.38.1 allows remote authenticated users to execute code. PrototypeSanitizer in packages/workflow/src/expression-sandboxing.ts resolves its sanitizer through dynamically scoped this and accepts the reserved __sanitize class-member name, allowing a crafted class field to rebind the sanitizer and reach the Function constructor. Workflow-create or workflow-edit access is required; backend execution runs in the n8n process, while editor preview can execute JavaScript in the session of a user who opens the workflow.

CVSS severity8.7
High
EPSS probability0.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in n8n before 1.123.76, 2.0.0 through 2.37.6, and 2.38.0 through 2.38.1 allows remote authenticated users to execute code. PrototypeSanitizer in packages/workflow/src/expression-sandboxing.ts resolves its sanitizer through dynamically scoped this and accepts the reserved __sanitize class-member name, allowing a crafted class field to rebind the sanitizer and reach the Function constructor. Workflow-create or workflow-edit access is required; backend execution runs in the n8n process, while editor preview can execute JavaScript in the session of a user who opens the workflow.

The record

CVE
CVE-2026-86076
Published
Sep 8, 2026
Updated
Sep 9, 2026
Vendor
n8n
Product
n8n
Classifications
CWE-94, T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.123.76
  2. Affected versionversion=>= 2.0.0, < 2.37.7
  3. Affected versionversion=>= 2.38.0, < 2.38.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

n8n · n8nversion=< 1.123.76; version=>= 2.0.0, < 2.37.7; version=>= 2.38.0, < 2.38.2

Published CVSS scores

8.7GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
T1059.007JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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